Bug 691210

Summary:	Bits of image missing
Product:	jbig2dec	Reporter:	Marcos H. Woehrmann <marcos.woehrmann>
Component:	Rendering	Assignee:	Robin Watts <robin.watts>
Status:	NOTIFIED FIXED
Severity:	normal	CC:	alex, christinedelight.top85
Priority:	P2
Version:	unspecified
Hardware:	PC
OS:	All
Customer:	850	Word Size:	---

Description Marcos H. Woehrmann 2010-03-24 05:29:36 UTC

When the attached file is converted using Ghostscript head (r10959) there are bits missing when compared to opening the file in Adobe Acrobat 9.3.1 or Apple Preview.

The appearance of the output changed with r10362 and r10372.

Command line I'm using:

  bin/gs -sDEVICE=ppmraw -o test.ppm ./45816.pdf

Comment 2 Alex Cherepanov 2010-03-25 05:35:25 UTC

This bug is caused by the interaction of /Interpolate flag and masked image.
Running the file with -dNOINTERPOLATE restores normal rendering.
This is not a JPXDecode problem.

Comment 3 Michael Vrhel 2010-07-07 03:39:33 UTC

Created attachment 6436 [details]
simplied file

Simplified file that contains only the troubled image. Will take a closer look at the interpolation code to see what the issue is

Comment 4 Michael Vrhel 2011-05-03 16:43:32 UTC

Passing to Robin to investigate since he has been working on interpolation.

Comment 5 Robin Watts 2011-05-24 18:30:56 UTC

This bug isn't actually to do with interpolation, it's to do with a long standing bug in the bitmap mask clip device that I fixed back in SVN revision 11918 (git hash = e5757ee).

As such this is now fixed and can be closed.